19787245020 has 36 divisors (see below), whose sum is σ = 60021310440. Its totient is φ = 5276598624.

The previous prime is 19787245007. The next prime is 19787245039. The reversal of 19787245020 is 2054278791.

It is a happy number.

19787245020 is a `hidden beast` number, since 1 + 9 + 78 + 72 + 4 + 502 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54964390 + ... + 54964749.

Almost surely, 2^19787245020 is an apocalyptic number.

19787245020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19787245020 is an abundant number, since it is smaller than the sum of its proper divisors (40234065420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19787245020 is a wasteful number, since it uses less digits than its factorization.

19787245020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109929154 (or 109929149 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The spelling of 19787245020 in words is "nineteen billion, seven hundred eighty-seven million, two hundred forty-five thousand, twenty".